Implement const expressions for local variables

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 7335 matching lines @@
 bool ContextScope::IsFinalAt(intptr_t scope_index) const {
   return Bool::Handle(VariableDescAddr(scope_index)->is_final).value();
 }
 
 
 void ContextScope::SetIsFinalAt(intptr_t scope_index, bool is_final) const {
   VariableDescAddr(scope_index)->is_final = Bool::Get(is_final);
 }
 
 
+bool ContextScope::IsConstAt(intptr_t scope_index) const {
+  return Bool::Handle(VariableDescAddr(scope_index)->is_const).value();
+}
+
+
+void ContextScope::SetIsConstAt(intptr_t scope_index, bool is_const) const {
+  VariableDescAddr(scope_index)->is_const = Bool::Get(is_const);
+}
+
+
 RawAbstractType* ContextScope::TypeAt(intptr_t scope_index) const {
+  ASSERT(!IsConstAt(scope_index));
   return VariableDescAddr(scope_index)->type;
 }
 
 
 void ContextScope::SetTypeAt(
     intptr_t scope_index, const AbstractType& type) const {
   StorePointer(&(VariableDescAddr(scope_index)->type), type.raw());
 }
 
 
+RawInstance* ContextScope::ConstValueAt(intptr_t scope_index) const {
+  ASSERT(IsConstAt(scope_index));
+  return VariableDescAddr(scope_index)->value;
+}
+
+
+void ContextScope::SetConstValueAt(
+    intptr_t scope_index, const Instance& value) const {
+  ASSERT(IsConstAt(scope_index));
+  StorePointer(&(VariableDescAddr(scope_index)->value), value.raw());
+}
+
+
 intptr_t ContextScope::ContextIndexAt(intptr_t scope_index) const {
   return Smi::Value(VariableDescAddr(scope_index)->context_index);
 }
 
 
 void ContextScope::SetContextIndexAt(intptr_t scope_index,
                                      intptr_t context_index) const {
   VariableDescAddr(scope_index)->context_index = Smi::New(context_index);
 }
 
@@ skipping 4574 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart